We examine the influence of microwave photoexcitation on the amplitude of Shubnikov--de Haas (SdH) oscillations in a two-dimensional GaAs/AlGaAs electron system in a regime where the cyclotron frequency ωc and the microwave angular frequency ω satisfy 2ωωc3.5ω. A SdH lineshape analysis indicates that increasing the incident microwave power has a weak effect on the amplitude of the SdH oscillations, in comparison to the influence of modest temperature changes on the dark-specimen SdH effect. The results indicate negligible electron heating under modest microwave photoexcitation, in good agreement with theoretical predictions.
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Ramanayaka et al. (2011) studied this question.
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